#1 Best Private Schools in Saint Charles, MO
Duchesne High School
Diocesan school · Grades 9–12
Smaller classes than 83% of Catholic schools in Missouri
Saint Charles, MO
A+Overall grade225 students8 students per teacher
2026 lists
Best Private Schools in Saint Charles, MO
Private schools in Saint Charles, MO with the highest overall grades. Top 9 of 9 schools.
#2 Best Private Schools in Saint Charles, MO
Academy of the Sacred Heart
Independent Catholic school · Grades Pre-K–8
Smaller classes than 68% of Catholic schools in Missouri
Saint Charles, MO
A+Overall grade164 students10 students per teacher
#3 Best Private Schools in Saint Charles, MO
St. Cletus School
Parish school · Grades Pre-K–8
Smaller classes than 70% of Catholic schools in Missouri
Saint Charles, MO
A+Overall grade176 students10 students per teacher
#4 Best Private Schools in Saint Charles, MO
Sts. Joachim & Ann School
Parish school · Grades Pre-K–8
One of 7 Catholic schools in Saint Charles
Saint Charles, MO
BOverall grade155 students12 students per teacher
#5 Best Private Schools in Saint Charles, MO
Seton Regional Catholic School
Parish school · Grades Pre-K–8
Growing: enrollment up 16% since 2011–12
Saint Charles, MO
BOverall grade248 students16 students per teacher
#6 Best Private Schools in Saint Charles, MO
St. John Paul II Preparatory
Independent Catholic school · Grades Pre-K–12
The smallest classes of any Catholic school in Saint Charles
Saint Charles, MO
B-Overall grade176 students7 students per teacher
#7 Best Private Schools in Saint Charles, MO
Immanuel Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
The largest Christian school in Saint Charles
Saint Charles, MO
B-Overall grade366 students13 students per teacher
#8 Best Private Schools in Saint Charles, MO
St. Joseph School
Parish school · Grades Pre-K–8
One of the 3 largest Catholic schools in Missouri
Saint Charles, MO
B-Overall grade891 students20 students per teacher
#9 Best Private Schools in Saint Charles, MO
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Growing: enrollment up 30% since 2011–12
Saint Charles, MO
B-Overall grade364 students18 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.